From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A9187C2BCA1 for ; Fri, 7 Jun 2019 15:55:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 839C32133D for ; Fri, 7 Jun 2019 15:55:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559922906; bh=UH2GyxQrvGwqm+gjCdaD8qaU9d7TkDrKOxpL2vBeJg4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=bUWCbLoUDTt/Ylz7N94AtcNNnGjBIeEPwA2qk+nRdS9JJ/TN9tPdfc4oTMMucAPVs RgUrm3oac2lLAnJLTeVEcJUE5fv80KnFwnCk/ZW8mgu2HlkmPuxbefezaFwPAIFhmM Q8lmHLFQxm7g3Engwb/fui0mUfY0sUncjvgEWX7s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731350AbfFGPqN (ORCPT ); Fri, 7 Jun 2019 11:46:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:58190 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729770AbfFGPqF (ORCPT ); Fri, 7 Jun 2019 11:46:05 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5B99621479; Fri, 7 Jun 2019 15:46:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559922363; bh=UH2GyxQrvGwqm+gjCdaD8qaU9d7TkDrKOxpL2vBeJg4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J2GfpeK0HLAEGVuMWhx0qYE5SCuEzPaA7MDx9Ok0e+D9Nso6JWaeJulGDOzyt5vBO xsSSlJIgnoVFHtFmr31s4mXoyJiiG3sSqApJPmSdu5kPm6Oi+X1TjfDfowvH2SX8Gc C9RXRS+PFs9vuBlUTSGf+Et369WXZiWjT8UQi6wY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jeffy Chen , Robin Murphy , Marc Zyngier , Brian Norris , Doug Anderson , Vicente Bergas , Heiko Stuebner Subject: [PATCH 4.19 60/73] drm/rockchip: shutdown drm subsystem on shutdown Date: Fri, 7 Jun 2019 17:39:47 +0200 Message-Id: <20190607153855.688780711@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190607153848.669070800@linuxfoundation.org> References: <20190607153848.669070800@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vicente Bergas commit b8f9d7f37b6af829c34c49d1a4f73ce6ed58e403 upstream. As explained by Robin Murphy: > the IOMMU shutdown disables paging, so if the VOP is still > scanning out then that will result in whatever IOVAs it was using now going > straight out onto the bus as physical addresses. We had a more radical approach before in commit 7f3ef5dedb14 ("drm/rockchip: Allow driver to be shutdown on reboot/kexec") but that resulted in new warnings and oopses on shutdown on rk3399 chromeos devices. So second try is resurrecting Vicentes shutdown change which should achieve the same result but in a less drastic way. Fixes: 63238173b2fa ("Revert "drm/rockchip: Allow driver to be shutdown on reboot/kexec"") Cc: Jeffy Chen Cc: Robin Murphy Cc: Marc Zyngier Cc: Brian Norris Cc: Doug Anderson Cc: stable@vger.kernel.org Suggested-by: JeffyChen Suggested-by: Robin Murphy Signed-off-by: Vicente Bergas [adapted commit message to explain the history] Signed-off-by: Heiko Stuebner Tested-by: Brian Norris Tested-by: Douglas Anderson Acked-by: Marc Zyngier Link: https://patchwork.freedesktop.org/patch/msgid/20190402113753.10118-1-heiko@sntech.de Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -442,6 +442,14 @@ static int rockchip_drm_platform_remove( return 0; } +static void rockchip_drm_platform_shutdown(struct platform_device *pdev) +{ + struct drm_device *drm = platform_get_drvdata(pdev); + + if (drm) + drm_atomic_helper_shutdown(drm); +} + static const struct of_device_id rockchip_drm_dt_ids[] = { { .compatible = "rockchip,display-subsystem", }, { /* sentinel */ }, @@ -451,6 +459,7 @@ MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ static struct platform_driver rockchip_drm_platform_driver = { .probe = rockchip_drm_platform_probe, .remove = rockchip_drm_platform_remove, + .shutdown = rockchip_drm_platform_shutdown, .driver = { .name = "rockchip-drm", .of_match_table = rockchip_drm_dt_ids,